2.4.0.84010 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)truefalseIn Millions, unless otherwise specifiedfalse1false falsefalseD2013Q3YTDhttp://www.sec.gov/CIK0001286964duration2012-11-01T00:00:002013-07-31T00:00:00OptionStandardhttp://www.heronlakebioenergy.com/20130731optionhlb0GallonStandardhttp://www.xbrl.org/2009/utrgalutr02false truefalseI2013Q3_HeronLakeBioEnergyPipelineCompanyMemberhttp://www.sec.gov/CIK0001286964instant2013-07-31T00:00:000001-01-01T00:00:00falsefalseHLBE Pipeline Company, LLCdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldihlb_HeronLakeBioEnergyPipelineCompanyMemberdei_LegalEntityAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli03false truefalseI2013Q3_AgrinaturalGasMemberhttp://www.sec.gov/CIK0001286964instant2013-07-31T00:00:000001-01-01T00:00:00falsefalseAgrinaturaldei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldihlb_AgrinaturalGasMemberdei_LegalEntityAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli04false USDtruefalse$I2013Q2_M0201_GrainStorageAndHandlingFacilitiesMember_FCACoOpMemberhttp://www.sec.gov/CIK0001286964instant2013-02-02T00:00:000001-01-01T00:00:00falsefalseGrain storage and handling facilitiesus-gaap_PropertyPlantAndEquipmentByTypeAxisxbrldihttp://xbrl.org/2006/xbrldihlb_GrainStorageAndHandlingFacilitiesMemberus-gaap_PropertyPlantAndEquipmentByTypeAxisexplicitMemberfalsefalseFCA Co-opdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldihlb_FCACoOpMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 1us-gaap_AccountingPoliciesAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES2false 2hlb_PlantCapacityhlb_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse5920000059200000falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsenum:volumeItemTypedecimalRepresents the capacity of plant facility.No definition available.false256Permitted capacity of Ethanol plant owned and operated3true 3hlb_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestLineItemshlb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Summary of significant accounting policies4false 4hlb_SalePriceOfPlantAssetshlb_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse37000003.7USD$falsetruefalsexbrli:monetaryItemTypemonetaryRepresents the amount of sale price of plant assets.No definition available.false2Price on which sale was closed5false 4hlb_OwnershipInterestInSubsidiaryhlb_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse00falsefalsefalse2truetruefalse0.730.73falsefalsefalse3falsetruefalse00falsefalsefalse4falsetruefalse00falsefalsefalsenum:percentItemTypepureThe parent entity's interest in net assets of a consolidated subsidiary, expressed as a percentage.No definition available.false0Percentage of Agrinatural Gas, LLC owned by HLBE Pipeline Company, LLC6false 4us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwnersus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3truetruefalse0.270.27falsefalsefalse4falsetruefalse00falsefalsefalsenum:percentItemTypepureThe equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.No definition available.false0Remaining percentage in Agrinatural Gas, LLC included as noncontrolling interest (as a percent)7false 2hlb_InitialTermOfTransportationAgreementhlb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse0010 yearsfalsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaRepresents the initial term for providing natural gas to the entity's plant under transportation agreement.No definition available.false0Initial term of providing natural gas to the plant8false 2hlb_NumberOfRenewalOptionshlb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse22falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerRepresents the number of renewal options.No definition available.false256Number of renewal options9false 2hlb_TermOfRenewedTransportationAgreementhlb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse005 yearsfalsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaRepresents the renewed term for providing natural gas to the entity's plant under transportation agreement.No definition available.false0Term of renewed contractfalseSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)HundredThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.heronlakebioenergy.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails49